What are the differences between Folkvangr and Valhalla in Norse mythology?

In Norse mythology, Folkvangr is the realm ruled by the goddess Freyja where half of the warriors who die in battle go, while Valhalla is the hall ruled by the god Odin where the other half of the warriors go. Folkvangr is associated with love and fertility, while Valhalla is associated with honor and glory in battle.